Improvement in tuck-creaser for sewing-machine



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JOHN n. MooNnY, or SAN FRANCISCO, CALIFORNIA.

Letters Patent IVe-97,544, dated December 7, 1869.

IMPROVEMENT IN TUCK-CREASER FOR SEWING-MACHINE.

l The Schedule referred to in these Letters Patent and making part ofthe same in Tuck-Markers; and I do hereby declare the followingdescription and accompanying drawings are Sulliciont to enable anyperson skilled in the art or science to which it most nearly appertains,to make and use rnysaid invention or improvements wit-hout furtherinvent-ion or etperment. 4

The nature of my invention consists of a device for simply marking o1'creasing the tuck, so arranged that it will bc noiselcss, and easilyadjusted. The tension or force of the tuck-bar may be regulated forthick or thin fabrics, without accelerating or -retarding the travel ofthe cloth beyond the ordinary speed imparted by thc'presscr-bot ot' vthesewing-machine. A second tuck may be creased while the previous one isbeing stitched.

Referring to the accompanying drawings- Figure l represents a sideelevation, showing the position of the striking-arm under the needle-armof a sewingfmachine. I

Figure 2 is a plan of tuck-marker.

They plate A, which carries the mechanism, rests upon the needle-plateofthe sewing-machine, and is kept in position by a vertical bar, B,passing through a slot in the table.

,The upper end of the plate is turned, to provide a swivel, o1' hinge,for the striking-arm C, the ends of vwhich are curved at nearly rightangles in opposite directions, one end entering the swivel, and theopposite angle is provided with a friction-roller, D, whiel1 is operatedby the bar C, which is in turn operated by the nccdle-arrn.

Near the lower curve of the arm C is also ,placed a friction-roller, D',which operates upon the conical cam aulne-end ot' the tuck-bar.

Ihe tuck-bar, or creasing-arm, is bent at right angies, and one endcarries the conical cam E, and the opposite end the creaser F, which isprovided' simply with a longitudinal groove. This bar works 1n a`)ournal at one side of the plate.

When the needle-arm plays upon the friction-roller l) at the end of thearm C, the roller D plays along the conical cam or roller E, whichcauses the creaser to impinge upon the, cloth to form the crease.

The spiralspringFaround the bar, throws it back when relieved bytheneedle-arm.

The force of theblow, or weight of the creaser7 is regulated by movingthe conical cam on 'the thread at the end of the tnciebar, therebylengthening or shortening the stroke of the needle-arm upon the rollerD.

Ihe face of the base-plate is marked 1, 2, 3, indicating inches, whichare subdivided into smaller' spaces; and the width of the tuck isregulated by adjusting the base-plate under the slotted holdingplate,which is held in place by a set-screw, and is grooved to receive therodH, which acts as a guide for the base-plate. The holding-plate may alsoassist in holding down the plate on the table.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

l. The arm C, having thereon friction-rollers D D", and operated by theneedle-arm in combination with the conical cam E, substantially asdescribed.

2. The. adjustable conical cam, in combination with the creasing-arm forregulating the force ofthe arm on the fabric, to form the crease, asdesired.

3. The combination, with the arm C, and the rocking' creasing-bar F, ofthe base-plate A, slotted holding-plate G, an'd rod H, when all areconstructed and combined as and for the purpose set forth.

In testimony whereof, I `have hereunto set my hand and seal.

JOHN H. MooNnY. [n s] Witnesses: d

C. W. M. SMITH, ALFRED Futon.

